Home / 815,499.60-1,223,443.80-394,429.20

Finding the Fourth Proportional to 815,499.60, 1,223,443.80 and 394,429.20

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Solution

The fourth proportional to 815,499.60, 1,223,443.80 and 394,429.20 is: 591,737.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,499.60 : 1,223,443.80 = 394,429.20 : x
  2. Step 2: Convert to fraction form
    815,499.60/1,223,443.80 = 394,429.20/x
  3. Step 3: Cross multiply
    815,499.60x = 1,223,443.80 × 394,429.20
  4. Step 4: Simplify right side
    815,499.60x = 482,561,959,278.96
  5. Step 5: Solve for x
    x = 482,561,959,278.96/815,499.60
  6. Step 6: Final answer
    x = 591,737.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.